Pump-agitator.



c. E. HOPKINS.

PUMP AG|TATOR..

APPLICATION HLED FEB. 17. I914." RENEWED MAR. 21. 1917.

1,24%,938. Patented 001;. 16, 1917. I

2 SHEETS-SHEET l- C. E. HOPKINS.

PUMP AGITATOR. APPLICATION man FEB. 17. 1914. RENEWED MAR. a, 19m.

Patented. Oct. 16, 1917.

memo

2 snsns-suzsr 2.

CHLES HOPKINS, OF NEW YORK, N. Y.

PUMP-AGITATOB.

Application filed February 17, 1914, Serial No. 819,209.

To all whom it may concern;

Be it known that I, CHARLES E. I-lorxnvs, a citizen of the United States, residmg at New York, in the county of New York and bottom of the melting pot, whereas the tin,

which is the lightest, will rise to the top, leaving the antimony in a layer therein between. To prevent this. separation of the metals of the alloy it is necessary to keep the mass in a state of agitation, either by a hand stirrer or power driven agitator. Similar' conditions exist with other alloys and compositions and this invention applies equally thereto.

The principal feature of my invention is the combination of a pumping means, with means for mixing the metal or other substances by agitating it; means for discharging the substance back into the melting pot, and means for closing the discharge outlet and thereby forcing the metal through a discharge nozzle into a casting chamber or mold.

My invention is illustrated in the accompanyi'ng drawings, in which- Figure 1 is a sectional view of a melting pot and stereotype casting box showing my pump-agitator in side elevation supported by the rim of the pot;

Fig. 2 is a plan of Fig. 1;

Fig. 3 is a front view;

Fig. 4. is a rear view, showing a portion of the pump chamber broken away and in section;

Fig. 5 is a cross section taken on line 5-5 of Fig. 3;

Fig. 6 is a cross section taken on line 6-6 of Fig. 3.

The pump-agitator is suspended within a melting pot 10 and supported by a foot 11 formed on a bracket 12. The bracket 12 is formed with a round channel or spout 13 extending from a pump casing seat 14 within the pot up and over the top side of the pot and out so its discharge nozzle 15 is alined-over the open mouth of a casting box chamber 0.

Bolted to the underside of the pump casing seat 14. is a pump mechanism consisting Specification of Letters Patent.

Patents Get. 16, 121%.

Renewed March 8,1917. Serial 110. 153,462.

of two gear wheels 16 and 17 meshing one with the other and mounted to run in bearings formed in a pump casing 18.

At the rear of the gear wheels is a pump chamber 19. This chamber is formed by the gear wheels on one side and the wall of the pump casing on the other curving from one gear face to the other. The wall overlaps the top and bottom sides of the gear wheels (See Figs. 3, 4 and 6). I

Gear wheel 16 is mounted on a stud 20, fast in bearings 21, 21 of the pump casing 18, and gear wheel 17 is mounted on the lower end of a shaft 22 operating in bearings 23, 23 formed in the pump casing 18 and extending up and through a bearing 24:, I

formed on an extending arm of bracket 12. A driving pulley 25 is made fast to the upper end of the shaft 22, to which power can be supplied from any suitable source for the purpose of keeping the gears in constant revolution during the mixing and casting operations.

The gears are revolved toward and by the vertical side walls 10, 4:0 of the pump chamber 19 (in the direction indicated by arrows in Fig. 6). Top and bottom walls 41 and 42 are provided to overlap the side faces of the gears. As the gears revolve metal is drawn into the chamber 19 between each two adjacent teeth. The metal is prevented from passing out of the chamber between the teeth owing to the gear teeth being in mesh during their passage out. 3 and 6).

Located in the pump casing seat 1 1, above thepump chamber 19, is an agitator dis- (See Figs.

charge opening 26' formed with a valve seat. A valve plunger 27 is mounted on a vertical rod 28 extending down through the discharge opening 26 and through the pump chamber 19 to a bearing 29 formed in the bottom of the pump chamber. The upper end of rod 28 operates in a bearing 39 formed near the top of the bracket 12.

The purpose of the plun er is to close the discharge opening and orce the metal to rise up in the spout '13 when a cast is desired. The operating means consists of a lever 31, pivoted by a stud 32 to the side of the bracket 12. The lever 31 is provided with an extension 33 at the rear of the pivot;

the loose end of this extension engages with I ing a casing adapted to be immersed in the of molten metal into the ump chamber and discharging it-through t e discharge opening 26. As the metal is forced out through the opening it strikes the underside of the plunger, which action causes it to deflate and create suficient agitation to keep the molten metal in the pot thoroughly mixed. When a cast is desired the operator pushes up on the operating lever, thereby closing the discharge opening 26. This action causes the metal to rise up and pass through the s out nozzle 15 into the casting box chamber as the metal nears the top of the casting chamber the operator draws the lever down and thereby lifts the plunger 2'? free from its seat in the discharge opening 26. This action allows the metal in the spout to return to the pot through the dischar e opening, and the flow through the nozz e 15 ceases.

The spout 13 is provided with a bridge wall 36, located at one side of and above the nozzle 15. lhis bridge wall holds the advancing metal back until the spout is comparatively full and causes it to break suddenly at the end of a cast on opening the discharge outlet. By this means a more even pressure is applied throughout the cast than it the metal started to flow as soon as it reached the nozzle, and the flow is quickly stopped on lifting the plunger.

Although I have illustrated and described a specific and detailed embodiment of my invention, I am aware of the fact that many modifications can be made therein, within the scope thereof as expressed in the claims, therefore, 1 do not wish to be limited to the exact construction, but what I do claim is 1. A pump for pumping metahcomprismolten metal and having openings through two sides thereof, two intermeshing toothed wheels extending into the casing through said openings so as to be located partly intense within and partly without it, means for rotating said wheels, and a discharge spout leading out of the casing.

.2. A pump comprising a casing adapted to be immersed in the material to be pumped,

two gear wheels extending therein but jouring pot, a chamber therein, a pair of mesh ing toothed wheels closing one side of the chamber, means for rotating said wheels toward the lnterior of sald chamber from the sides to force llquld material into the chamber, said chamber having a discharge outlet opening into the pot, and means for opening and closing said outlet whereby when the outlet is opened the operation of said wheels will agitate and min the mate rial therein.

5. In a pump, the combination of a closed spout, a nozzle at the end of the spout, a bridge above the nozzle in the spout, and a means for operating the pump to force substance through the spout, for the purpose set forth.

In testimony whereof I have hereunto set my hand, in the presence of two subscribing witnesses.

' CHARLES E. HQPKINS.

Witnesses:

L. Lmro, F. W. Howmno,

means for rotating the gearv 

